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ENVIRONMENTAL HEALTH bEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> .Y oG ProgramCoordinators <br /> gonna K. Heran, R.E.H.S. <br /> 304 East Weber Avenue,Third Floor Carl Borgman, R.E.H.S. <br /> DirectorMike Huggins, R.E.H.S.,R.D.I. <br /> Laurie A. Cotulla, R.E.H.S. Stockton,California 95202-2708 Margaret Lagorio, R.E.H.S. <br /> r 3420s <br /> Assistant Director Telephone: (209)4b8- <br /> CQt�.�O.Ra. <br /> a Robert McCfellon, R.E.H.S. <br /> Fax: (209) 464-0138 Jeff Carruesco, R.E.H.S. <br /> Website:www.sjgov.org/ehd/ <br /> Kasey holey,R.E.H.S. <br /> PORT OF STOCKTON VAR 19 2007 <br /> .TEFF WINGFIELD 1 RITA KOEHNEN <br /> 2201 W. WASHINGTON ST <br /> STOCKTON CA 95201 <br /> RE: UST Site #3 Site Code: 1282124 <br /> Port Rd 13 at G St RO#: 0673 <br /> Stockton, CA. 95201 CUF#: 013777 <br /> San Joaquin County Environmental Health Department (EHD) has reviewed <br /> Work Plan for Site Assessment(Plan) dated March 6, 2007 and has the following <br /> comments. <br /> The work plan was required by the EHD in order to continue the lateral and <br /> vertical definition of the petroleum plume. The plan authors proposed the <br /> installation of four shallow (-20-feet deep) push points (133-16 through 133-19), <br /> one deep (45-feet deep) push type soil boring (133-15), and one shallow (25-feet <br /> deep) monitoring well (MW3-7). Soil samples and ground water grab samples <br /> collected are to be analyzed for TPH as gasoline (8015) and BTEX, MtBE, DI PE, <br /> TAME, TBA, EtBE, 1,2-DCA, and EDB (8260B) and lead (200.7). <br /> The EHD approves the location.of the borings with the condition that the shallow <br /> soil borings be extended deeper to include soil and ground water grab sample <br /> collection from the sand layer noted on cross sections in previous reports <br /> beginning at approximately 22 to 25 feet below ground surface ('bgs). <br /> Additionally, proposed monitoring well MW3-7 is to extend into this same sand <br /> layer. The proposed 15 feet of screened interval (10'-25' bgs) should be <br /> modified/extended to 20 feet and the END recommends a 8'-28' bgs screened <br /> interval so as to include the shallow ground water interface and the sand layer <br /> shown on cross sections to begin at 25' bgs in that area or install two wells, a <br /> shallow one in the finer-grained soil, and a deeper one in the sand --a potential <br /> contaminant migration pathway. <br /> With the above noted changes, the work plan will be adequate and necessary <br /> [H&S 25296.10(c)(3)]. Please submit a Well Permit Application Form and $374 <br /> to the EHD immediately. <br />